Chusetts



i May 26, 1931.

I DIE FOR SWAGING MACHINES Filed Nov. 18. 1929 2 Sheets- Sheet 1 IN V EN TOR.

A TTORNEYS.

's. c. cRoss Patented May 26, 1931 UNITED STATES PATENT osrics SAMUEL o. CROSS, or WEST SPRINGFIELD, MASSACHUSETTS, Assiie'non o IVIOOR-E DROP FORGING COMPANY, or SPRINGFIELD, MASSACHUSETTS, A CORPORATION or MASSA- GHUSETTS DIE FOR SWAGING MACHINES Original application filed March 28, 1929, Serial No. 350,563. :Divided and this application filed November 18, 1929. Serial No. 407,986.

This is a division of my application filed March 28, 1929, under Serial No. 350,563, and relates more particularly to improvements in swaging machines. The present invention is illustrated in connection with the standard type of Dayton-Torrington rotary swaging machines.

In these rotary swaging machines, the reciprocating hammers and dies are carried in a planetary travel around the Work be ng operated upon so that the swaging operation on the work has been confined to the formation of surfaces round in cross section. Moreover, it is customary in such machines to introduce and withdraw the work during the continuous operation of the machine and consequently the work performed is usually of a tapered formation.

The purpose of the present inventlon is to increase the utility of such machines by enabling work of flat, irregular and non-round shape to be swaged. In general, this is ac complished by the provision of rotative bearing surfaces between the backs of the separable dies and the faces of the reciprocating hammers, whereby the hammers may partake of their usual planetary movement and the dies will be given a. hammering action against the work but otherwise may remain in fixed relation thereto.

The drawings illustrate a standard form of Dayton-Torringtou swaging machine of the rotary type with my present lmprovement applied thereto. Referring to said drawings:

Fig. 1 is a front elevation of such chine showing in dotted lines the dlspositlon of the roll rack and hammer members;

, Fig. 2 is a longitudinal section of the same along line 2-2 of Fig. 1;

Fig. 3 is an enlarged front detail new of the roll rack, spindle head, hammers and dies;

Fig. 4 is a view in perspective of the dies; and Fig. 5 is a view in perspectlve of the supplemental hammer members.

Referring more particularly to the draw ings: 1 is the stationary base support carrying in fixedrelation thereto a cylindrical head 2 recessed at its'front face to receive the moving parts of the machine. The spindle 3 is mounted in a bearing (as shown of the stationary head 2, and has at its rear end fast and loose pulleys 4, and integral with its front end the spindle head 16. 15 is the circular rack mounted for free rotation around the outside of the spindle head 16 and within the recessed portion of the stationary frame head 2. A face plate 8, fixed to the head 2, is also provided to retain the rack in position. The rack 15, as is usual, comprises a plurality of bearing portions for receiving therein loosely the operating rolls 17 of the machine. The hammers 18 and the supplemental hammer members 19 are slidably mounted in a diametrically extendmg groove on the face of the spindle head 16,

and the upper ends of Said hammer members 18. are rounded in the usual manner for 00- ac'ting with the opposed rolls 17 carried in the rack 15. In some cases the hammer members 18' and supplemental hammer members 19 may be formed as" one integral piece instead of separable as shown. Except for the .supplementalhammer members 19, the parts so far described are of standard construction.

As will be noted more particularly in Figs.

3, t and 5, the supplemental hammer menu bers 19 are formed on their inner ends with concave bearing surfaces 19a to receive therein the dies 20, which dies are formed with convex semi-cylindrical back surfaces. In this way the dies 20 fit loosely within the "opposed facesof the supplemental hammer members 19 to provide a rotative bearing therebetween whereby the dies 'may be held against rotation during the planetary movement of the hammer members around the same. The front faces of the dies 20 (as shown in Fig. 4;) are formed with the impressions for shaping the non-round piece of work to be swaged. In Fig. 3, the work holding plates 5, 6 and 7 are mounted on the face of the spindle head for retaining the hammer members and dies thereon. The holding plate 6 is centrally perforated as shown and the spindle 3 is also made hollow being swaged is indicated at 21. The usual 9 I so that the work may be introduced between the dies and withdrawn during the operation of the machine.

In operation, the spindle 3 with its head 16 is given a rapid rotation and the hammer members 18 and 19, carried thereby, are brought into successive contact with the opposed rolls 17 by centrifugal forces and are given a pounding action in the usual manner against the dies 20 and the interposed work 21 for swaging the same. Inasmuch as the dies 20 do not partake of the rotary move ment, the work acted upon may be held stationary in the hand of the operator during the swaging action thereon and may be introduced and withdrawn during the operation of the machine in the usual manner.

Claims:

1. The combination with a swaging machine having reciprocating hammer members partaking of a planetary movement around the work to be swaged, of a pair of work engaging dies separable from said hammer members and having rotative bearing surfaces in engagement with said hammer members whereby it is possible for the dies to remain non-rotative relative to the work during the operation of the machine.

2. The combination with a swaging machine having reciprocating hammer members partaking of a planetary movement around the work to be swaged, of a pair of work engaging dies separable from said hammer members and having cylindrical bearing surfaces in engagement with said hammer members whereby it is possible for the dies to remain non-rotative relative to the work during the operation of the machine.

3. The combination with a swaging machine having reciprocating hammer members partaking of a planetary movement around the work to be swaged, of a pair of dies separable from said hammer members, said dies having opposed work engaging faces for shaping a non-round piece of work, said faces being so shaped as to hold the work from rotation relatively to the dies and cylindrical back portions fitted in a bearing of the hammer members, whereby the dies may remain non-rotative relative to the work during the operation of the machine.

In testimony whereof I have affixed my signature.

SAMUEL C. CROSS. 

